You Rock!
How can igneous rock turn into metamorphic rock?
Heat and Pressure
What process moves rocks?
Erosion
A rock is pushed far underground and completely melts, then erupts from a volcano and hardens.
Igneous
Dinosaur fossils were found above trilobite fossils. Which animal was living on Earth first?
Trilobites were living first.
How can metamorphic rock turn into sedimentary rock?
Weathering, Erosion, Deposition, Compaction, and Cementation.
What process breaks down rocks?
Weathering
A rock is broken down by wind and water into small particles, which then are compacted and compressed together.
Sedimentary Rock
The geological time scale is divided into periods of _______ lengths.
Unequal Lengths
Igneous rocks form from what material?
Magma, Lava, or Molten Rock
What kind of rock forms when rock melts, cools, and solidifies?
Igneous Rock
First: the rock is broken down by wind and water into small particles, which flow under a river and get compressed into rock.
Second: the rock is pushed underground and experiences high pressure and heat that causes its minerals to line up in different ways.
Third: the rock is pushed further underground and completely melts, then erupts from a volcano and hardens.
Sedimentary
Metamorphic
Igneous
A rock formation has six distinct layers with a fault cutting across them. What is the youngest part of the formation?
The fault is younger.
Sedimentary rocks form from small pieces of rock called ____?
Sediment
What kind of rock forms when sediments are buried, squeezed, and cemented together?
Sedimentary Rock
First: the rock is pushed underground and completely melts, then erupts from a volcano and hardens.
Second: the rock is broken down by wind and water into small particles, which flow under a river and get compressed into rock.
Third: the rock is pushed underground and experiences high pressure and heat that causes its minerals to line up in different ways.
Igneous
Sedimentary
Metamorphic
How can fossils of sea animals be found on mountain tops?
The mountain was once underwater.
How can sedimentary rock turn into an igneous rock?
Melting and Cooling
What process changes sedimentary rock into metamorphic rock?
Heat and Pressure
First: the rock experiences high pressure and heat that causes its minerals to line up in different ways.
Second: the rock is pushed further underground and completely melts, then erupts from a volcano and hardens.
Third: the rock is broken down by wind and water into small particles, which flow under a river and get compressed into rock.
Metamorphic
Igneous
Sedimentary
How is the geological time scale divided?
Based on the fossil and rock record.